Boring-machine



(No Model.) 4 fiheets-Sheet' 1.

I J. SWAN.

. BORING MACHINE. No. 341.520. Patented May 11, 1886.

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(No Model.) 4Sheets-Sheet 2.

J sW-AN.-

BORING MAGHINE- No. 341,520. v Patented may 11,1886.

N. PETERS, PholmLitho-nwnr. Wliu'ngton. D. C.

(No Model.) 4 Sheets-Sheet 3.

J. SWAN.

BORING MACHINE.

No. 341,520. Patented May 11, 1886.

N6 Modl.) 4 Sh-eets8het 4. J. SWAN.

- BORING. MACHINE.

No. 341,520. q Patented May 11, 1886.

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UNITED. STATES PATENT OFFICE.

JAMES SWAN, OF SEYMOUR, CONNECTICUT.

BORING-MACHINE.

SPECIFICATION forming; part of Letters Patent No. 341,520, dated May 11, 1886, Application filed January 18, 1886. Serial No.188,955i (No model.)

machines illustrated in my former patent, No.

210,220, dated November-26, 1878, and has for 1ts ob ect to improve the general construction and arrangement of the machine. W'ith these ends in view, I have devised the novel machine of which the following description, in connection with the accompanying drawings, is a specification, reference being had to the numbers upon the drawings to indicate the several parts of the machine.

Figure 1 is a front elevation of the machine complete; Fig. 2, a rear elevation-4. a, seen from the position of the operator; Fig. 3, a side elevation; Fig. 4, a central vertical section, the operating parts being in elevation; Fig. 5, a detail cross-section on the line a: as in Fig. 2; Fig. 6, a cross-section on the line y y in Fig. 4, partially in elevation, showing the parts in the position they occupy when in the act of boring; Fig. 7, a similar cross-section, showing the position of the parts at the instant the rack is thrown into engagement with V the bevel-gear; Fig. 8, a detail cross-section on the linezzin Fig. 4.,corresponding with Fig. 6@'. 6., showing the parts in the position of boring; Fig. 9, a similar cross-section corresponding with Fig. 7-i. 0., showing the p0sition of the parts at the instant the rack is thrown into engagement with the bcvel-gear; and Fig. 10 is a similar cross-section, showing the position of the parts when suspended out of operative position.

1 indicates the base or bed of the machine, and 2 a movable framework journaled upon a bracket, 3, which spans the base. The framework is preferably made of metal, and is provided with a central opening, 4, having straight sides 5. the bottom and tapers upward toward the top, as clearly shown in Figs. 3 and 4, the metal being thickest at the back and decreasing in The frameworkis made widest atthickness toward the front of the frame-work. The special details of construction of this frame-work are important, as I am enabled to make alight and very strong frame-work at very slight expense, the distribution of the metal being such as to secure the greatest possible strength for the purposes intende( that is to say, the strength is greatest at the points where the strain comes in use.

6 indicates the upper half of the journalbox, which is cast integral with the framework, and 7 the lower half, the two halves being secured together by bolts in the usual manner. It will readily be seen that by loosening one or both of the bolts the framework may be adjusted at any desired angle.

Sis a carriagewhich engages the straight sides 5 of the frame-work and slides thereon. This carriage supports all the operating parts of the machine except the rack.

9 is a shaft journalcd upon brackets 10 upon the carriage.

11 indicates the usual adjustable cranks at the ends of the shaft.

12 is a bevel-gear upon the shaft, which on gages a corresponding gear, 13, at the upper end of spindle 14. The spindle is supported in guides-or bearings 15, and is provided atits lower end with the usual chuck, 16, to receive an anger or bit, 17.

18 is the rack, having at its ends pintles or journals 19, which are in line with each other, but are set eccentrically to the body of the rack itself. The upper j ournal turnsin bracket 20, which is secured to the frame-work, and the lower journal in bracket 21. The lower bracket is provided with an incline, 22, and a notch, 23, both of which are engaged by alug, 24., at the base of the rack. At the back of the-notch is a flange or guard, 25,which serves to strengthen the bracket, and also as a guard to prevent the rack from passing beyond the notch when thrown out of engagement with bevel-gear 12. I

Just under bevel-gcarlS is a disk, 26, which is rigidly secured to the spindle, and is provided with a notch, 27, one side of which is straight and the other curved, as clearl y shown in Figs. 8, 9, and 10.

28 is a dog pivoted to a bracket, 29, upon the carriage. This dog is substantially the shape of a bell-crank lever, one end, 30, being 34 is a weighted catch, pivoted to the carriage and free to swing thereon, said catch being adapted to engage notch 35 in the framework, whereby the carriage is held suspended.

36 is a threaded rod suspended in any suitable manner from the upper end of the framework, which passes through a portion of the carriage, and is provided with a nut, 37, against which the carriage strikes when the auger or bit has bored to the desired depth. This nut is, in short, a gage for regulating the depth of the holes to be bored.

The operation is as follows: As already stated, the frame work may be adjusted to bore vertically or at any desired angle. In

Fig. 3the parts are shown out of operative position. To commence boring it is simply necessary to lift the weighted catch out of engagement with notch 35, which will allow the carriage to slide down until the point of the auger is in contact with the wood. The shaft is then rotated in the usual manner. As soon as the hole has been bored to the desired depth, which is indicated by the carriage resting upon nut 87, a backward movement of the cranks permits end 30 of the dog to drop into notch 27, the straight side preventing it from being thrown out again. It should be understood that in the act of boringthat is, when the shaft is being turned forward-the curved side of the notch allows the dog to pass out thereof at each revolution ofthe disk and spin die. As end 3.0 of the dog drops into notch 27 when the shaft is reversed, end 31 of course swings around toward the right, as shown in Fig. 9, and acts to throw the rack into engagement with bevel-gear 12. The shaft is now turned forward again, and the rack being in engagement with the bevel-gear 12, which is upon the carriage, the latter is at once raised, and the weighted catch drops into notch 35, to hold it at its raised position. WVhile in the act of boring, lug 24 rests in notch 23 upon bracket 21. The action of the dog, however, when end 30 drops into the notch in the disk, is to throw the latter out of this notch and upon incline 22, so that, although the dog is immediately thrown out of engagement with" the rack by the curved side of the notch in the disk, the weight of the rack itself, the lug being upon incline 22, tends to keep the rack in engagement with bevel-gear 12, so that there is no danger of the rack flying out of engagement-after lug 2a has been thrown out of notch 23 by the action of the dog and its spring. As soon as the carriage has been raised high enough to permit the weighted catch to engage notch 35 in the frame-work, a

backward movement of the shaft will throw the rack out of engagement with bevel-gear 12-that is to say, therack is thrown back far enough to permit lug 2a to engage the notch in bracket 21. This throwing of the rack out of engagement by reverse movement of the shaft is owing to the fact that the action of the teeth of gear 12 upon the rack-teet-h,when the shaft is reversed, tends to lift the rack backward up the incline, while on the other hand the forward movement of the shaft, when the rack is in engagement with bevel-gear 12, tends to draw the rack downward, so that it rests firmly upon bracket 21, thus causing the carriage to be raised. Fig. 10 illustrates the position of the disk, dog, and rack while the carriageisinitssuspendcdposition. Itwillbe observed that end 31 of the dog is engaged by boss 33 upon the rack and held entirely out of contact with the disk, so that while the carriage is in this position the shaft may be turned in either direction without any effect whatever. The position of these parts in the act of boring is illustrated in Fig. 8. The disk of course turns from left to right, so that as fast as end 30 of the dog drops into notch 27, it rides out again over the curved side of the notch. As soon, however, as the shaft is reversed-that is, turned from right to left-the straight side of the notch comes in contact with the dog as soon as it drops in, and prevents it from being thrown out until the shaft is turued forward again, this position of the parts being clearly shown in Fig. 9. It will thus be seen that from the instant the carriage is released from its suspended position until a hole hasbeen bored and the carriage raised and again held at its suspended position all the operations of the machine are performed without removing the hands from the cranks and without a seconds delay, the only part of the machine that is not operated through the cranks being the catch that engages the frame-work to hold the carriage in its raised position. It will of course be understood that the details of construction are not essential parts of my invention, but may be varied within reasonable limits without departing from the spirit thereof.

Having thus described my invention, I claim 1. In a boring-machine, the combination, with the frame-work, the sliding earriage,and the spindle having gear 13, and shaft having gear 12 carried thereby, of a swinging rack carried by the frame-work, a notched disk, 26, upon the spindle, and dog 2S,whereby the rack is thrown into engagement with gear 12, to raise the carriage when the dog engages the notch in the disk.

2. The carriage, the shaft, and spindle having gears 12 and 13, and the rack having lug 24, in combination with bracket 21, having incline 22, the notched disk on the spindle, and the dog 28, whereby the rack is thrown into engagement with gear 12 when the shaft is reversed, and retained in engagement when the shaft is turned forward.

3. The carriage, the shaft having gear 12, the spindle having gear 13 and. notched disk 26, and the dog 28, in combination with the rack having lug 24 and boss 33, engaged by said dog, and bracket 21, having notch 23,engaged by said lug, whereby the rack is held out, of engagement when the carriage is suspended.

4. The carriage, the shaft having gear 12, the spindle having gear 13 and notched disk 26, and the dog 28, which engages said disk, in combination with the rack and weighted catch 34, which engages the frame-work, whereby the rack may be thrown into engagement and the carriage lifted and held suspended without removing the hands from the cranks.

5. The frame-work, the sliding carriage,and the shaft, spindle, and gears supported there on, in combination with threaded rod 36,which passes through a portion ofthe carriage, and nut 37 upon the rod, which limits the downward movement of the carriage, and consequently the depth of the hole bored.

6. A frame-work for boring-machines whose sides are made widest at the bottom and taper toward the top, having 'a central opening at the back with straight sides to guide a carriage, and having the metal thickest at the back, and decreasing in thickness toward the front.

7. The rack havinglug 24, and bracket 21, having notch 23, in combination with the shaft having gear 12, the spindle having gear 13 and notched disk 26, and the spring-actuated dog 28, which engages the notch in said disk, and also bears against the rack.

8. The rack having lug 24, and bracket 21, having notch 23 and incline 22, both engaged by said lug, in combination with the shaft having gear 12, the spindle having gear 13 and notched disk 26, and the spring-actuated dog 28, which engages said disk.

9. The swinging rack having boss 33, in combination with the shaft and the spindle having gears 12 and 13, the notched disk on the spindle, the dog, and spring 32, said dog being adapted to engage either the swinging rack or the notched disk.

10. The spindle having gear 13 and disk 26, with notch 27, straight on one side and curved on the other, and the spring actuated dog which engages said disk, in combination with the shaft having a gear, 12, and the swinging rack, which is engaged by said dog.

11. The spindle having notched disk 26 and a gear, 13, spring 32, and the dog having ends 30 and 31, in combination with the shaft having a gear, 12, and a swinging rack,which engages said gear, the dog being adapted to engage either the rack or the notched disk.

12. The carriage-rod 36, which is attached to the frame-work and upon which the carriage slides, and nut 37 upon said rod, in combination with the shaft having gear 12, the spindle having gear 13, and the notched disk, the swinging rack, and the dog adapted to engage either the disk or the rack.

13. The frame work having notch 35, the carriage having weighted catch 31, the shaft having gear 12, and the spindle having gear 13 and the notched disk, in combination with the dog and the swinging rack, said dog being adapted to engage both the rack and the disk.

14. The spindle having a gear and notched disk, the dog adapted to engage said disk, and the swinging rack having lug 24, in combination 'with bracket 21, having incline 22 and notch 23, both adapted to be engaged by said lug, and the shaft having a gear engaging the gear on the spindle.

15. In a boringmachine, the base and a bracket, 3, secured thereto, in combination with the framework having a half-box made integral therewith and a half-box, 7, detachably secured thereto, whereby the flfllllG-WOlk and parts carried thereby may be adj nsted to change the angle of boring.

16. In a boringmachine, the base having bracket 3,with half-box 7, and the frame-work having half-box 6 cast integral therewith, in combination with a sliding carriage upon said frame-work, which carries the operative parts of the machine.

In testimony whereof I affix my signature in presence of two witnesses.

JAMES SXVAN.

\Vitnesses:

V. BUCKINGHAM, HENRY BRADLEY. 

